For measuring the activity of a radioactive sample, a count rate meter is used. At certain observation , count rate meter 5050 counts per minute but a

Question

For measuring the activity of a radioactive sample, a count rate meter is used. At certain observation , count rate meter 5050 counts per minute but a

For measuring the activity of a radioactive sample, a count rate meter is used. At certain observation , count rate meter 5050 counts per minute but after 10 minute later , the count rate showed 2300 counts per minute . Calculate the disintegration constant (`lambda`)
A. 0.065 per min
B. 0.078 per min
C. 0.24 per min
D. 0.868 per min

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
`dM/dt` = `lambdaN_(0)`
`therefore` `N_(0)/N = (dN_(1)//dt)/(dN_(2)//dt) = (5050)/2300) = 2.19`
Also, In `N_(0)/N=lambdat`
In (2.19) = `lambdat`
`lambda = ((2.19))/(10 = 0.078` per min

4 views Answered 2023-02-05 15:29